Surface roughness effects on cylindrical grazing incidence x-ray optics for transition radiation

Quartz and nickel cylinders were used as grazing incidence x-ray optics for transition radiation (TR) from Al, Ti, and Cu foil stacks. The cylinders were used to direct the otherwise diverging TR to a small spot (1 mm diameter), with measured fluxes of up to 330 W/A cm2 averaged over the spot area....

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Veröffentlicht in:Journal of applied physics 1993-11, Vol.74 (9), p.5320-5326
Hauptverfasser: HO, A. H, PIESTRUP, M. A, SILZER, R. M, SKOPIK, D. M
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container_end_page 5326
container_issue 9
container_start_page 5320
container_title Journal of applied physics
container_volume 74
creator HO, A. H
PIESTRUP, M. A
SILZER, R. M
SKOPIK, D. M
description Quartz and nickel cylinders were used as grazing incidence x-ray optics for transition radiation (TR) from Al, Ti, and Cu foil stacks. The cylinders were used to direct the otherwise diverging TR to a small spot (1 mm diameter), with measured fluxes of up to 330 W/A cm2 averaged over the spot area. Computer simulations were performed and compared to the measured results. It was found that including surface roughness effects in the form of a Debye–Waller reduction factor on the reflectivity was necessary to get good agreement between the simulations and experimental results in certain cases, but not in others. A simple heuristic model which can be used to determine when roughness effects are important is presented. Use of this model in conjunction with the computer simulations accurately predicts the measured results, and further suggests the use of different optic materials at different x-ray wavelengths.
doi_str_mv 10.1063/1.354233
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It was found that including surface roughness effects in the form of a Debye–Waller reduction factor on the reflectivity was necessary to get good agreement between the simulations and experimental results in certain cases, but not in others. A simple heuristic model which can be used to determine when roughness effects are important is presented. Use of this model in conjunction with the computer simulations accurately predicts the measured results, and further suggests the use of different optic materials at different x-ray wavelengths.</abstract><cop>Woodbury, NY</cop><pub>American Institute of Physics</pub><doi>10.1063/1.354233</doi><tpages>7</tpages></addata></record>
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subjects 440600 - Optical Instrumentation- (1990-)
ALUMINIUM
COPPER
ELECTROMAGNETIC RADIATION
ELEMENTS
Exact sciences and technology
FEEDING
FOCUSING
FOILS
GRAZING
INCIDENCE ANGLE
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
IONIZING RADIATIONS
METALS
OPTICAL REFLECTION
OTHER INSTRUMENTATION
Physics
RADIATIONS
REFLECTION
ROUGHNESS
SURFACE PROPERTIES
SURFACES
TITANIUM
TRANSITION ELEMENTS
X RADIATION
X- and γ-ray instruments and techniques
title Surface roughness effects on cylindrical grazing incidence x-ray optics for transition radiation
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